Solve These:-

An engineer with Haliburton calculated the AW values shown for a presently owned machine by using estimates be obtained from the vendor and company records. Retention AW Value. Period, Years 5 per Year -RI, OOD -87,DOD -890OD -95,000 A challenger has an economic service life of 7 years with an AW of $ 86,000 per year. Assume that used machines like the one presently owned will always be available and that the MARR is 12%% per year. If all future costs remain as esti- mated for the analysis, the company should pur- chase the challenger: [a) Now (b) After 2 years [o) After 3 years () Never\f\f\f\f